Cotton-gin rib



(No Model.) 9 W'. DEERING.

COTTON GIN RIB. No. 289,996,; Patented D90. 11, 1883;

WILLIAM DEERING, orIoIIIsvILLE, KENTUCKY.

COTTON-GIN VRIB.

SPECIFICATION forming part of Letters Patent No. 289,996, dated December 11, 1883.

Application filed July 11, 1883. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM DEERING, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Cotton-Gin Ribs; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1. of the drawings is a front View of four ribs ofacotton-gin,showing my improvements applied. Fig. 2 is a side View of a rib, with my improvements, and asaw in position for operation. Fig. 3 is a cross-sectional view of the rib, taken on the liner x of Fig. 1.

This invention has relation to cotton-gin ribs of the class indicated in Letters Patent No. 283,109, issued to J. B. Gray, February 22, 1881. These ribs have notches cut into their sides at the points at which the teeth of the saws carry the lint from the seed-cotton hopper out to the gin-brush, the purpose of the notches being to provide outlets for the staple which are more free than those afforded by ribs made without such notches. My invention is an improvement upon or valuable addition to the invention of Gray.

In all saw cotton-gins there is a disposition in the saw-teeth to'carry through the openings between the ribs debris of various kinds, as well as lint, and this disposition is evidently more or less helped by any enlargements of the openings or passages through which the saws work. In the patent of Gray the notches in the ribs provide enlargements of the pas- 4o sages between the ribs. The front faces of his ribs are transversely flat, so that the mass of seed-cotton rests or rolls flatly on the fiattened surfaces between the notches. On my improved rib I form a transverse convexity, or more 'or less angular flange projecting from and occupying all or nearly all the face of the rib above and below the notches. These intervening convexities or'fianges indicated at a in the accompanying drawings, above and below the notches I), prevent the seed-cotton, which, in the action of the gin, rolls in contact with the saws from rubbing or rolling along in the same planewith the notches, and in this'manner materially decrease the tendency to clog. By making the flange on theback of the rib convex the cotton will have no tendency to hang to the rib, as it would if the flange had a rectangularsurface.

Having described this invention, what I 6c claim, and desire to secure by Letters Patent, 1s-

A cotton-gin rib having a flange or transverse convcxity on the outer or convex face, and notches in the sides or edges at the points at which the saws carry'the lint out from the seed-cotton hopper, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM DEERINGQ Witnesses: i

MARY O. REx'rER, J. C. DUBoIs; 

